The service is also more user-friendly, simply requiring a look at your device to activate, meaning there's no need to remember lengthy passwords or ID numbers.

“Iris recognition allows you to unlock your TSB mobile app with a simple glance, meaning all of those IDs, passwords and memorable information become a thing of the past," said Carlos Abarca, TSB’s chief information officer, noting that this was just one step in the company's ongoing digital transformation.

“As well as a more customer-friendly approach to identification, iris recognition is also the most secure method of authentication available today. We want our mobile app customers to continue to have a fast, easy-to-use experience; iris recognition delivers that and, when combined with our other security measures, an unparalleled level of cyber security.”